1. **Problem Statement:** Given a net of a cuboid with points labeled including point X, determine which two points will join with point X when the net is folded into the cuboid. 2. **Understanding the net:** A cuboid net consists of 6 rectangles arranged so that when folded, they form the 3D shape. Points on edges that meet when folded will coincide. 3. **Key idea:** Points on edges that share a fold line will join. Point X is on the rectangle below the middle rectangle (with points I, A, X). This rectangle folds up to meet the rectangle with points H, G, I, A. 4. **Identify adjacent points:** Point X is adjacent to points A and I on its rectangle. When folded, the edge containing X will meet the edge containing points on the rectangle with points D, C, B, E or the rectangle with points G, F, E, B. 5. **Matching edges:** The rectangle with points I, A, X folds up to meet the rectangle with points H, G, I, A along the edge I-A. Since X is adjacent to A, the point that joins with X must be adjacent to A on the rectangle H, G, I, A. 6. **Conclusion:** The two points that join with point X when folded are points B and C, which are adjacent to A on the rectangle D, C, B, E, because the rectangle with D, C, B, E is adjacent to the rectangle with I, A, X along the edge A. **Final answer:** Points B and C join with point X when the net is folded into the cuboid.